Detcon CX-IR - Manual (Page 30)

Model CX-IR
1. Use a 1 /
16
" Allen wrench to release the locking setscrew that locks the ITM and splashguard adapter
assembly together.
NOTE One turn of the setscrew will suffice - Do not remove setscrew completely.
2. Remove the splashguard. Unthread and remove the splashguard adapter assembly from the ITM.
3. Gently pull the plug-in sensor out of the ITM. Verify that the gas type and range of the new sensor cell
is correct. Orient the new plug-in sensor so that it matches with the female connector pins. When
properly aligned, press the sensor in firmly to make the proper connection.
4. Thread the splashguard adapter assembly onto the ITM to a snug fit and tighten the locking setscrew
using the 1 /
16
" Allen wrench. Reinstall the splashguard.
5. Check and perform zero calibration and span calibration in accordance with Section 3.3.
5.2 Replacement of ITM – Aluminum J-Box
1. Remove the power source to the sensor assembly. Disconnect all sensor wire connections at the
junction box terminal board, taking note of the wire connections.
NOTE
It is necessary to remove power to the junction box while changing the ITM in order to
maintain area classification.
2. Use a wrench at the top section of the ITM and unthread the ITM until it can be removed.
3. Use a
1
/
8
" Allen wrench to release the locking cap head screw that locks the ITM and splashguard
adapter assembly together.
NOTE One turn of the setscrew will suffice - Do not remove setscrew completely.
4. Unthread and remove the splashguard adapter assembly and splash guard from the ITM. These will be
re-used with the new ITM.
5. Gently remove the plug-in toxic gas sensor from the old ITM and install the sensor in the new ITM.
Orient the plug-in sensor so it matches the female connector pins on the new ITM and press the sensor
in firmly to make proper connection.
6. Thread the splashguard adapter assembly onto the new ITM until snug, tighten the locking cap head
screw and reinstall splash guard.
7. Feed the sensor assembly wires through the
3
/
4
" female NPT port and thread the assembly into the J-
box until tight and the ITM faces toward the front access point. Use the locking nut to secure the ITM
in this position. Re-connect the sensor assembly wires to the terminal board inside the junction box.
8. Check and/or perform Zero Calibration and Span Calibration in accordance with Section 3.3.
5.3 Replacement of ITM – Stainless Steel Mini Condulet
NOTE
It is necessary to remove power to the Junction box while changing the ITM in order to
maintain area classification.
CX-IR Instruction Manual Rev. 1.2 Page 26 of 34